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  * Copyright (c) 2013, Francis Galiegue <>
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the Lesser GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
  * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * Lesser GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <>.
package com.github.fge.jsonschema.format.helpers;
import static com.github.fge.jsonschema.messages.FormatMessages.*;

Validator for the host-name format attribute.

Important note: the basis for host name format validation is RFC 1034. The RFC does not require that a host name have more than one domain name component. As such, foo is a valid hostname.

Guava's is used for validation.

public final class SharedHostNameAttribute
    extends AbstractFormatAttribute
    public SharedHostNameAttribute(final String fmt)
    public void validate(final ProcessingReport reportfinal FullData data)
        throws ProcessingException
        final JsonNode instance = data.getInstance().getNode();
        try {
        } catch (IllegalArgumentException ignored) {
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